Construction of internal-combustion engines



y 1930- J. 1M. HEINRICH. H 1,757,862

CONSTRUCTION OF INTERNAL COMBUSTION ENGINES Filed Nov. 9, 1927 3 Sheets-Sheet l //v vat rag y 1930.. J. M. HEINRICH 1,757,362

CONSTRUCTION OF INTERNAL COMBUSTION ENGINES Filed Nov. 9, 1927 3 Sheets-Sheet 2 n (I,1IIl llllIIIIIIIIIIIIIIII/lllilillllI,a).

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" J. M. HEINRICH CONSTRUCTION OF INTERNAL COMBUSTION ENGINES May 6, I930.

Filed Nov. 9, 1927 v5 Sheets-Shee 3 Patented May 6, 1930 umrsosmrss PATENT OFFICE JEAN MARIE HEINRICH, or PARIS, FRANCE, ASSIGNOR T0 socIE'rE DES Mo'rEURs SALMSON sYsTEME cAnron-UNnE', or PARIS, FRANCE CONSTRUCTION OF INTERNAL-COMBUSTION ENGINES Application filed November 9, 1927, Serial No. 232,175, and. in France November 15, 1926.

The current practice has shown that the internal combustion engines comprising cylinders of a small size gave more satisfactory results than the engines formed of largesized cylinders, and for this reason it is now preferred to proi ide a large number of cylinders in the case of high power engines, said cylinders being arranged in various manners.

The present invention relates to an engine comprising a cylinder unit which consists of one or several pairs of cylinders assembled in line in the plane or planes containing the crankshaft axis.

The said'cylinder unit ofi'ers among others the following advantages: it provides for a strong unit which may be properly adapted for air cooling, and further, it provides for the control of inclined valves bymeans of rods and levers which are mounted above one single cylinder of the pair.

The appended drawing shows, by way of example, a two cylinder unit according to the invention:

Fig. 1 is an end view on the side of the controls, with the valve control rods removed.

Fig. 2 is a verticalsection on the line II II of Fig. 1.

Fig. 3 is a horizontal section on the line TIL-III of Fig. 2.

Fig. 4 is a fragmentary horizontal section on the line IV-IV of Fig. 2. v

Referring to the drawing, A and B (Fig. 2) are two cylinders made of a strong metal, which are connected together near their lower part by a common coupling flange C which adapted to rest on the engine casing; said cylinders are connected together at the upper part by the embedded or soldered bridge piece D which prevents all relative motion of the said cylinders. 7

Each cylinder is formed in the known manner with valve seats, admission and exhaust ports, bosses for the spark plug and for the engine starter, and lugs for attaching the radiating envelope. v

The radiating envelope F consists of a good heat-conducting metal body provided with cooling ribs V; it is secured or cast upon the said cylinders in such manner as to cover the parts adapted to receive it.

Various holes H are pierced between the cylinders and lined with good heat-conducting tubes G. Sheet metal deflectors I may be secured to the cooling ribs, as shown in Fig. 1, in order to guide the streams of cool ing air toward the tubes H.

The cylinder A is provided with lugs J pierced with holes in which are disposed the lower ends of bolts K whose upper ends are adapted to support a plate L which forms the sole support for the valve levers M and P of the two cylinders.

The valves are associated with springs R which engage the plates S surrounding the valve ports. The valve-control levers M and 'P are actuated by rods T which are actuated by the usual valve cams. The levers M and P situated on the right side of Fig. 1 and represented in Fig. 2 control respectively the inlet valve of the cylinder A and the inlet valve of the cylinder B. The levers M and P situated on the left side of Fig. 1 control respectively the exhaust valve of the cylinder A and the exhaust valve of the cylinder B. The rods T controlled by the usual cams (not shown) cause the several valves to be successively opened by means of the levers M and P, so as to obtain in the known manner the difierent stages of the thermodynamic cycle in each cylinder. 7

The advantages of the arrangement above described are the following:

Since the two cylinders are joined by the common flange C and by the bridge piece D, they will form an integral unit adapted to transmit the stresses in all directions.

The valve controlling levers are supported above one of the cylinders; it should be observed that if a suiiicient thickness of metal were provided at the top of the supporting cylinder so as to rigidly support the. said levers, this great thickness would interfere with the proper cooling of the cylinder head. To obviate this detect, the apparatus according to the invention comprises a plate L, separate from the cylinder head and is supported, above the cylinder head, by bolts whose securing lugs of increased thickness are provided at the lower part of the cylinder vall which is much cooler than the upper part. Fin'thermore, due to this arrangement, the plate L to which the said levers are pivoted readily removable.

The control rods T are all located on the same side. i. e. at the front of the engine. The sides ot the cylinders are uncovered as far as possible, whereby the air flow and the cool ing will be facilitated.

Due to the plOVlRlOll of the holes H and the deflecting members I, the cooling air will. be directed to all points which would tend to remain too hot.

By the use of a light metal for the radiating envelope, I obtain an engine having the minimum weight, all useless weight being obviated.

Having now described my invention, what I claim new and desire to secure by Letters Patent is: v

1. In an internal combustion engine, the combination of a pair of cylinders, distinct valves for each of said'cylinders and control levers for saidvalves pivotally supported by one cylinder of the pair.

2. In an internal combustion engine, the combination of a pair of cylinders, distinct valves for each of said cylinders, a single support carried by one of said cylinders and control levers for said valves pivotally mounted on said single support.

3. In an internal combustion engine, the combination of a pair of cylindirs, heads for said cylinders, distinct valves for each said cylinders, a single support carried by one of said cylinders independently of the heads of said cylinders and control levers for said valves pivotally mountedon said single support.

l. In an internal combustion engine, the combination of a pair of cylinders, heads for said cylinders, distinct valves for each of said cylinders, a single support carried by the bottom part of one of said cylinders independently of the heads of said cylinders and control levers for said valves pivotally mounted on said single support.

In an internal. combustion engine, the combination of a pairot cylinders, heads for said cylinders, distinct valves for each of said cylinders, rods secured to the bottom part oi one of said cylinders and extending substant ally parallel with the cylinder-axis towardsthe upper part of said cylinder, a singlesupport carried by the upper ends of said rods independently of the headset the cylinders and control levers for said valves pivotally mounted on said single support.

In an ii'iternal' combustion engine, theconibination ofa pair'of cylinders disposed side-by side, distinctva-lvesfor each of said cylinders, a single support carried by one" oi? said cylinders-and control vle'versiorsaid disposed on tl es1deo1. thesijippor con'ibination of a pair of cylinders having" at their bottom part a common flange securing" said cylinders together, a cooling envelope for the two cylinders and a bridge piece different fromsaid coolingenvelope connecting the upper part of said cylinders.

In testimony whereof'I have signed my name to this specification.

JEAN MARIE HEINRICH. 

